The throttle is heavy. Is there any way to reduce it?

It is necessary to clean the throttle valve. Generally speaking, there is no problem with the throttle line, because the throttle line is always dynamic. Generally, the throttle valve should be cleaned once every 5000 km to 10000 km. You can operate it yourself. Buy a can of throttle (carburetor) cleaner, remove the air filter of the intake valve, start it, and spray it at the intake. Be sure to control the engine speed. You can pull the throttle line by hand, otherwise the speed will be higher.